Question

A recipe calls for 3 cups of milk to make 30 biscuits. How many cups of milk will you need to make 45 biscuits?

Answer 1

The answer is: 4.5 cups.

The explanation is shown below:

1. You  need 3 cups of milk to make 30 biscuits.

2. Therefore, to solve the exercise you only need to multiply 45 biscuits by 3 cups and divide this by 30 biscuits.

3. Let's call the cups you will need to make 45 biscuits $x$. Then, you have:

$x=\frac{(45)(3)}{30}\\x=4.5$

4. Therefore, you will need 4.5 cups  to make 45 biscuits.